merger

Thomas Horton, who led American and its parent company, AMR Corp., since 2011, gave up the post of chief executive to Doug Parker, the former chief executive at US Airways. Horton will serve as chairman of the board of the new American Airlines Group Inc.

Thomas Horton, who led American and its parent company, AMR Corp., since 2011, gave up the post of chief executive to Doug Parker, the former chief executive at US Airways. Horton will serve as chairman of the board of the new American Airlines Group Inc. (Joe Raedle / Getty Images)

Thomas Horton, who led American and its parent company, AMR Corp., since 2011, gave up the post of chief executive to Doug Parker, the former chief executive at US Airways. Horton will serve as chairman of the board of the new American Airlines Group Inc.Joe Raedle / Getty Images